Pneumatic tire.



PATBNTBD 0012 1903;

P. mantis, PNEUMATIC TIRE.

APPL IULTIOH FILED HAIL 80. 1908.

no Mann;

w: NORRIS PETERS co. ymcrrmgrruo" wasnmtmon. a. z;

Patented October 6, 1903.

PATENT OFFICE.

PHILIP MAGNUS, OF COLLINGW'OOD, VICTORIA, AUSTRALIA.

PNEUMATIC TIRE.

SPECIFICATION forming part of Letters Patent No. 740,578, dated October6,

Application filed March 30, 1903. Serial No. 150,308. (No model.)

ments in Pneumatic Tir-es, of which the following is a specification.

The object of my Invention is to provide single or double concentricair-tube tires for vehicles which shall not only be strong and durable,but also cheap.

In order that my invention may be better understood, I will now refer tothe accompanying sheet of drawings. which are to be taken as part ofthis specification andread herewith.

Figure 1 represents a section of a tire in which the air-tube around itstread has a tread-ring of leather. This is shown inside the cover; butit may be inside the liner. Around the outside of the liner and thetreadring is situatedaleather cover. Fig. 2 represents, on an enlargedscale, a side sectional elevation of the meeting ends of a leather coverand of a tread-ring when in the fl'atstate. Fig. 3 shows a transversesection of the sides or' edges of the leather cover or tread-ring. Fig.4. depicts anair-tube covered by a leather casing and usable formotorcarsor other heavy vehicles. A tongue is stitched inside thiscasing, and the two edges of the casing are drawn together by laces.

Around this casing is placed my leather cover. Fig. 5 shows an elevationof a casing around the air-tube, showing the laces, duo.

Similar letters of reference indicate similar or corresponding partswhere they occur in the several views.

On reference to the drawings 'it will be seen that A represents the rimofa cycle, motor-car, or other vehicle-wheel in which there arecircumferential grooves or recesses formed by thebead or roll B and theback surface 0 of the said rim. Insidethis is one or more, concentricair-tubes D. Surrounding the airetube is a liner E. This, which isgenerally known as the fabric, is preferably made of cotton or othermaterial and can either be endless or itsstwo ends overlap each other.The two .sides of the liner'near the edges can either be of singlethickness or be made double .by the outer edge being turned back orfolded over onto the main part. In either case the folds F of the linerare turned back upon the main portion E and inclose a retainer,preferably formed of endless wires or rings G. Instead of wires or ringsor in addition to the same I may use a ring of balls or spheres. Ifthese are used, the liner edge containing them is reinforced on theinside. Two or more rows of stitches secure the fold F to the liner E.Secured outside the liner and extending between the wire rings is thecover H. This is made of leather treated as hereinafter described, andits edges are wedge-shaped, as seen at H" in Fig. 3. This cover is wideenough for the point of the wedge-shaped portion thereon to extendbeyond each ring G, and in some cases each edge may extend farther andrest inside the ring and against the back surface 0. The said cover Hisin one or more pieces or lengths. If it is cut out of one piece, it isspecially treated, so that there is obtained an equal tension upon bothedges when it is distended into a circular form.

If jointed, the meeting ends butt or meet each other, as seen in Fig. 2,and blindstitchesH are inserted from the interior of the said'cover.

In some cases I place between the liner and the cover or the liner andthe air-tube an inher tread-ring K. The edges of this are wedge-shaped,and the said tread-ring may be either stitched or cemented to the coveror be stitched or cemented to the liner. Around the exterior of thecover may also be stitched or cemented or otherwise secured a leather,rubber, or other tread-ring. The edges of this are preferablywedge-shaped and may entera circumferential incision or incut made inthe said cover.

In a modification of the foregoing the airtube D is surrounded by aleather casing L or a casing inside which is soft material. The edges Lof this casing do not meet, but

have entered near the said edges a series of eyelet-holes M toaccommodate a draw lace or'laces M. Inside this and protecting theair-tube from the laces is situated a leather tongue-ring N. One edge ofthis, N, is

- parts; naphtha, about two parts; isinglass,

about four drains. Three coats in all are applied. When dry, the bodysides of the leather cover which has been treated to the same number ofcoats of the same solution are then placed around the liner and thewedgeshaped edges by hand or tools pressed downwardly upon the sides ofthe liner. When the whole is dried, the mold,which is reducible indiameter, is withdrawn and French chalk is applied where necessary.

I preferably use leather treated according to the process described inmy companion application, Serial No. 150,309, filed herewith, as it hasgreater durability than any other similar material known to me.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The improved pneumatic tire consisting of a rim, a concentricair-tube, an outer casing, a tongue therein one edge of which isstitched inside the said casing, eyelet-holes around the edges of saidcasing, and a drawlace therein, a liner each single or reinforced edgeof which is turned back upon the main portion, and incloses an endlessretainer, the retainers, a cover, the edges of the said cover beingwedge-sectioned and each bearing against one side of the adjacentretainer, and the back surface of the rim, as and for the purposedescribed.

2. A pneumatic tire comprising a rim, a concentric air-tube, an outerleather casing, and a liner having returned edges, circular retainersinclosed in the returned edges of the liner to secure it in place, acover having meeting ends secured by blindstitches, and having its edgessecured between the returned edges of the liner and the inner edges ofthe rim, substantially asand for the purpose described.

In witness whereof I have hereunto set my vhand to this specification inthe presence of Witnesses:

CECIL W. LE PLASTRIER, GEORGE A. UREN.

